WELL DESCRIPTIONS AND WATER LEVEL MEASUREMENTS

GROUND-WATER LEVELS

LOGAN COUNTY

List of Aquifers

463417099271002. Local number, 136-070-26BBB2.

LOCATION.--Lat 46�'17", long 99�'10", Hydrologic Unit 10130103. Owner: North Dakota State Water Commission.

AQUIFER.--Streeter.

WELL CHARACTERISTICS.--Drilled observation well, depth 62 ft, cased with 39 ft of 6-in diameter plastic pipe, No. 25 slot screen set 39 to 44 ft below land-surface datum.

INSTRUMENTATION.--Water-level recorder. From November 1978 to current year, daily minimum recorded water levels also are available.

DATUM.--Altitude of land-surface datum is 1,909.8 ft. Measuring point: Top of casing 1.80 ft above land-surface datum.

PERIOD OF RECORD.--November 1978 to current year.

EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 16.97 ft below land-surface datum, July 15, 1979; lowest daily water level, 27.85 ft below land-surface datum, August 29-31, 1992.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
MAXIMUM VALUES (DAILY LOW WATER LEVEL)

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 DAY  OCT    NOV    DEC    JAN  FEB  MAR    APR    MAY    JUN    JUL    AUG    SEP
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5     ---    21.03  20.85  ---  ---  ---    20.51  20.45  19.99  19.67  19.89  20.12
10    ---    20.92  20.84  ---  ---  ---    20.47  20.50  19.88  19.60  20.03  19.98
15    ---    20.92  20.85  ---  ---  ---    20.51  20.41  19.77  19.51  19.98  19.92
20    ---    20.93  ---    ---  ---  ---    20.46  20.30  19.66  19.47  19.94  19.82
25    ---    20.88  ---    ---  ---  ---    20.49  20.23  19.61  19.42  19.96  19.68
 EOM  21.06  20.87  ---    ---  ---  20.50  20.49  20.18  19.66  19.73  20.14  19.61

 MAX  21.06  21.06  20.88  ---  ---  20.51  20.53  20.55  20.13  19.73  20.14  20.16
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463240099483801. Local number, 136-073-35DDD1.

LOCATION.--Lat 46�'40", long 99�'38", Hydrologic Unit 10130103. Owner: North Dakota State Water Commission.

AQUIFER.--Napoleon.

WELL CHARACTERISTICS.--Drilled observation well, depth 282 ft, cased with 168 ft of 1.25-in diameter plastic pipe, No. 18 slot screen set 168 to 171 ft below land-surface datum.

INSTRUMENTATION.--Measured using a steel tape.

DATUM.--Altitude of land-surface datum is 1,970 ft. Measuring point: Top of casing 1.80 ft above land-surface datum.

PERIOD OF RECORD.--April 1979 to current year.

EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 27.38 ft below land-surface datum, September 29, 1999; lowest water level measured, 34.62 ft below land-surface datum, November 18, 1992.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

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             WATER               WATER              WATER                WATER
   DATE      LEVEL     DATE      LEVEL    DATE      LEVEL     DATE       LEVEL
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  Oct. 29    29.01    May 17     28.12    Aug. 2    28.41    Sept. 29    27.38
  Mar. 26    28.66    June 18    28.28
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463240099483802. Local number, 136-073-35DDD2.

LOCATION.--Lat 46�'40", long 99�'38", Hydrologic Unit 10130103. Owner: North Dakota State Water Commission.

AQUIFER.--Napoleon.

WELL CHARACTERISTICS.--Drilled observation well, depth 131 ft, cased with 118 ft of 1.25-in diameter plastic pipe, No. 18 slot screen set 118 to 121 ft below land-surface datum.

INSTRUMENTATION.--Measured using a steel tape.

DATUM.--Altitude of land-surface datum is 1,970 ft. Measuring point: Top of casing 1.90 ft above land-surface datum.

PERIOD OF RECORD.--April 1979 to current year.

EXTREMES FOR PERIOD OF RECORD.--Highest water level measured, 27.61 ft below land-surface datum, May 17, 1999; lowest water level measured, 37.07 ft below land-surface datum, September 23, 1993.

WATER LEVEL, IN FEET BELOW LAND SURFACE DATUM, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

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             WATER               WATER              WATER               WATER
   DATE      LEVEL     DATE      LEVEL    DATE      LEVEL     DATE      LEVEL
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  Oct. 29    28.66    May 17     27.61    Aug. 2    28.02    Sept. 29    28.00
  Mar. 26    28.21    June 18    27.86
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